EP3136629A1 - Rundfunkweiterleitungsunterstützungsvorrichtung, steuerungsverfahren für rundfunkweiterleitungsunterstützungsvorrichtung und steuerungsprogramm - Google Patents

Rundfunkweiterleitungsunterstützungsvorrichtung, steuerungsverfahren für rundfunkweiterleitungsunterstützungsvorrichtung und steuerungsprogramm Download PDF

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Publication number
EP3136629A1
EP3136629A1 EP14889887.7A EP14889887A EP3136629A1 EP 3136629 A1 EP3136629 A1 EP 3136629A1 EP 14889887 A EP14889887 A EP 14889887A EP 3136629 A1 EP3136629 A1 EP 3136629A1
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EP
European Patent Office
Prior art keywords
broadcast
broadcast audio
anomaly
audio signals
assistance device
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP14889887.7A
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English (en)
French (fr)
Other versions
EP3136629B1 (de
EP3136629A4 (de
Inventor
Yuuki FUNAHASHI
Seiki KATAYAMA
Hideki Nagao
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Toshiba Corp
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Toshiba Corp
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Publication of EP3136629A1 publication Critical patent/EP3136629A1/de
Publication of EP3136629A4 publication Critical patent/EP3136629A4/de
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Publication of EP3136629B1 publication Critical patent/EP3136629B1/de
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B17/00—Monitoring; Testing
    • H04B17/40—Monitoring; Testing of relay systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04H—BROADCAST COMMUNICATION
    • H04H20/00—Arrangements for broadcast or for distribution combined with broadcast
    • H04H20/02—Arrangements for relaying broadcast information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04H—BROADCAST COMMUNICATION
    • H04H20/00—Arrangements for broadcast or for distribution combined with broadcast
    • H04H20/12—Arrangements for observation, testing or troubleshooting

Definitions

  • Embodiments of the present invention relate to a broadcast relay assistance device, and a control method and a control program for a broadcast relay assistance device.
  • broadcast audio signals (radio program) are produced in a studio with studio equipment and transmitted to a transmitting station with a transmitter via a relay device.
  • AM waves are generated with the transmitter and sent to a certain broadcast service area.
  • transmitters adopt control technique for blocking AM wave outputs for a short period of time in case of occurrence of anomaly such as stroke of lightning and release thunder energy to the ground (grounding), for example.
  • AM wave outputs are blocked for a short period of time for the purpose of blocking continuation of a load short circuit state (follow current) generated by the thunder energy.
  • Patent Literatures propose a technique to monitor a standing wave ratio (SWR) or discharge light and to block AM wave outputs for a short period of time.
  • SWR standing wave ratio
  • conventional transmitters include a mechanism to block AM wave outputs for a short period of time upon occurrence of anomaly such as a stroke of lightning to protect the transmitters.
  • short-time blocking of AM wave outputs may cause silent time in broadcast audio signals received by a receiver and thus interruption of sound for example, which may result in auditorily undesirable broadcasting.
  • the present invention has been devised in consideration to the above.
  • An object thereof is to provide a broadcast relay assistance device, and a control method and a control program for a broadcast relay assistance device which can mitigate the influence of a silent state on a listener even when the silent state occurs (short-time blocking of AM wave outputs) upon occurrence of anomaly.
  • a memory of a broadcast relay assistance device of an embodiment stores broadcast audio data corresponding to input broadcast audio signals in a chronological order.
  • an output unit performs processing including reading, from the memory, based on an anomaly detection signal received from outside, the broadcast audio data corresponding to the broadcast audio signals that would have been broadcast during an anomaly detected period, and outputting the corresponding broadcast audio signals after an anomaly is resolved.
  • FIG. 1 is a schematic explanatory diagram of the configuration of a medium wave radio broadcast system of an embodiment.
  • a medium wave radio broadcast system 10 includes a broadcast audio signal generation device 21 to generate a broadcast audio signal Sba that is audio signals for broadcasting, a relay device 22 to relay the broadcast audio signal Sba generated by the broadcast audio signal generation device 21, a transmitter 23 to modulate the amplitude of the broadcast audio signal Sba relayed by the relay device 22 and to output it as transmission signal, an antenna matcher 24 to match impedance between an output terminal of the transmitter 23 and an antenna 25, and the antenna 25 to emit the transmission signal being high frequency signal into a space as radio wave.
  • FIG. 2 is a schematic block diagram of the configuration of a transmitter.
  • the transmitter 23 functions as a broadcast relay assistance device.
  • the transmitter 23 includes an audio unit 32 which receives the broadcast audio signal Sba generated by the broadcast audio signal generation device 21 via the relay device 22 and an audio signal input terminal 31 and adds a time code representing a reproduction order to the broadcast audio signal Sba to store it as broadcast audio data Dba and output the broadcast audio signal in association with the time code, and an AM wave generator 33 having n power amplifiers (PAs) (not illustrated), to generate AM waves by AM modulation of carrier waves based on the broadcast audio signal output by the audio unit 32 and to output the AM waves.
  • PAs power amplifiers
  • the transmitter 23 includes a pickup 35 to output the AM waves output from the AM wave generator 33 without change to the antenna matcher 24 via an AM wave output terminal 34 and to pick up AM waves for detection of anomaly such as a stroke of lightning when continuance of broadcasting may cause the transmitter 23 to fail due to such anomaly, an anomaly detector 36 to detect an anomaly based on the AM waves picked up by the pickup 35 and to output an anomaly detection signal upon detection of the anomaly, and an instantaneous halting unit 37 to, upon receipt of the anomaly detection signal, control the AM wave generator 33 to halt the output, and to notify the audio unit 32 of output halting start upon the receipt of the anomaly detection signal and to notify the audio unit 32 of output halting cancellation upon no receipt of the anomaly detection signal.
  • a pickup 35 to output the AM waves output from the AM wave generator 33 without change to the antenna matcher 24 via an AM wave output terminal 34 and to pick up AM waves for detection of anomaly such as a stroke of lightning when continuance of broadcasting may cause the transmitter 23 to fail due to
  • the pickup 35 picks up an AM wave output from the AM wave generator 33 and measures a voltage value and a current value.
  • the pickup 35 outputs the measured voltage value and current value to the anomaly detector 36 as pick-up signals Sp.
  • the anomaly detector 36 is configured as an analog circuit including an analog IC such as an operational amplifier which receives the voltage value and the current value (measured values) measured by the pickup 35 as the pick-up signals Sp.
  • the anomaly detector 36 performs addition, subtraction, division, smoothing, or correction on the measured voltage value and current value and outputs them to the instantaneous halting unit 37 as an anomaly discrimination value Vm.
  • the anomaly detector 36 can calculate the anomaly discrimination value Vm from the voltage value and a voltage value different in phase by n/2 from the voltage value.
  • the instantaneous halting unit 37 In order to block the AM wave generator 33 from outputting AM waves for a certain period of time by controlling a power amplifier (not illustrated) of the AM wave generator 33 to be into an off state from an on-controlled state based on the anomaly discrimination value Vm, the instantaneous halting unit 37 outputs the anomaly detection signal Se to the audio unit 32.
  • FIG. 3 is a functional block diagram of the configuration of the instantaneous halting unit.
  • the instantaneous halting unit 37 includes a fast protector 37A.
  • This fast protector 37A is configured of an analog circuit for example as illustrated in FIG. 3 .
  • the fast protector 37A controls all of the power amplifiers (not illustrated) of the AM wave generator 33 to be placed into an off state from an on-controlled state based on the anomaly discrimination value Vm and outputs as the anomaly detection signal Se a first control signal PC11 which places the AM wave generator 33 in a halting state.
  • the instantaneous halting unit 37 further includes a slow protector 37B.
  • This slow protector 37B is configured as a composite circuit of an analog circuit and a digital circuit as illustrated in FIG. 3 .
  • the slow protector 37B outputs as the anomaly detection signal Se a second control signal PC12 which controls all of the power amplifiers (not illustrated) of the AM wave generator 33 to be placed in the off state from the on-controlled state based on the anomaly discrimination value Vm to place the AM wave generator 33 in the halting state.
  • the fast protector 37A of the instantaneous halting unit 37 is configured of an analog circuit including an analog IC such as an operational amplifier or a comparator to output to the audio unit 32 the first control signal PC11 as the anomaly detection signal Se that controls all of the on-controlled power amplifiers of the AM wave generator to be placed in the off state when the anomaly discrimination value Vm output by the anomaly detector 36 is more than or equal to a first reference value which is a preset threshold value.
  • the slow protector 37B of the instantaneous halting unit 37 is configured as a composite circuit of an analog circuit including an analog IC such as an operational amplifier or an A/D converter and a digital circuit such as a CPU, a CPLD, and an FPGA.
  • the slow protector 37B outputs the second control signal PC12 as the anomaly detection signal Se to the audio unit 32.
  • a pulse width of the first control signal PC11 output by the fast protector 37A is set to be longer than an operation delay time in the slow protector 37B configured as a composite circuit of an analog circuit and a digital circuit. This is to prevent the protection by the fast protector 37A from being cancelled before the protection by the slow protector 37B starts, that is, before the second control signal PC12 is output.
  • the slow protector 37B restarts all of the power amplifiers (not illustrated) to place them in the on state again for a short period of time and recalculates the anomaly discrimination value Vm.
  • the anomaly discrimination value Vm falls to or below the first reference value, the output of the anomaly detection signal Se is canceled.
  • the slow protector 37B further has a function to increase or decrease the anomaly discrimination value Vm when the value vm output by the anomaly detector 36 is less than or equal to the first reference value and more than or equal to the second reference value which are preset threshold values.
  • the AM wave output is not blocked during the increase or decrease operation and the anomaly detection signal Se is thus not output basically.
  • the anomaly detection signal Se can be output to implement broadcast relay assistance processing.
  • the broadcast relay assistance processing will be described later. In this case, for example a dynamic range controlling process may be added to add a sound quality improving method.
  • the anomaly discrimination values Vm of the fast protector 37A and the slow protector 37B may differ, however, they can be deemed equivalent for the operation since the difference is attributable to different calculation results from the same source.
  • FIG. 4 is a schematic block diagram of the configuration of the audio unit.
  • the audio unit 32 generally includes a trigger 42, a control memory 44, and a shrinker 46.
  • the trigger 42 receives the anomaly detection signal Se via an anomaly information input terminal 41 and outputs a control signal for the output control of the broadcast audio signal Sba based on the anomaly detection signal Se.
  • the control memory 44 receives the broadcast audio signal Sba via an audio signal input terminal 43, encodes the broadcast audio signal Sba, and stores it as the broadcast audio data added with a time code representing a reproduction order.
  • the control memory 44 further sequentially outputs the broadcast audio data during normalcy, calculates silent time upon occurrence of anomaly based on the control signal output by the trigger 42, and outputs silent time data corresponding to the silent time and the broadcast audio data Dba corresponding to the silent time data.
  • the shrinker 46 adjusts actual reproduction time of the broadcast audio signal Sba corresponding to the broadcast audio data Dba based on the decoded broadcast audio data Dba and the silent time data for output from an audio signal output terminal 45.
  • the broadcast audio signal generation device 21 of the medium wave radio broadcast system 10 generates broadcast audio signals Sba as audio signals for broadcasting and outputs them to the relay device 22.
  • the relay device 22 relays the broadcast audio signals Sba generated by the broadcast audio signal generation device 21 to the audio signal input terminal 31 of the transmitter 23.
  • the audio unit 32 of the transmitter 23 receives the broadcast audio signals Sba from the relay device 22 via the audio signal input terminal 31, adds a time code representing a reproduction order to the signals and stores them as broadcast audio data. In parallel with this, the audio unit 32 outputs, to the AM wave generator 33, the broadcast audio signals Sba in association with the time code.
  • the AM wave generator 33 performs AM modulation of carrier waves based on the broadcast audio signals Sba output by the audio unit 32 to generate AM waves and outputs them to the pickup 35.
  • the pickup 35 outputs the AM waves output by the AM wave generator 33 to the antenna matcher 24 via the AM wave output terminal 34. In parallel with this, the pickup 35 picks up AM waves for anomaly detection.
  • the anomaly detector 36 calculates the anomaly discrimination value Vm based on the AM waves picked up by the pickup 35 and outputs the value to the instantaneous halting unit 37.
  • the instantaneous halting unit 37 does not output the anomaly detection signal Se.
  • the AM wave generator 33 thus continues to output AM waves and the antenna matcher 24 matches impedance between the output terminal of the transmitter 23 and the antenna 25.
  • the antenna 25 emits high-frequency transmission signals to a space as radio waves for broadcasting.
  • the broadcast audio signal generation device 21 of the medium wave radio broadcast system 10 generates the broadcast audio signals Sba as audio signals for broadcasting and outputs them to the relay device 22.
  • the relay device 22 relays the broadcast audio signals Sba generated by the broadcast audio signal generation device 21 to the audio signal input terminal 31 of the transmitter 23.
  • the audio unit 32 of the transmitter 23 receives the broadcast audio signals Sba from the relay device 22 via the audio signal input terminal 31, adds to the signals Sba a time code representing a reproduction order, and stores them as broadcast audio data. In parallel with this, the audio unit 32 outputs, to the AM wave generator 33, the broadcast audio signals Sba in association with the time code.
  • the AM wave generator 33 performs AM modulation of carrier waves based on the broadcast audio signals Sba output by the audio unit 32 and thereby generates and outputs AM waves to the pickup 35.
  • the pickup 35 outputs the AM waves output by the AM wave generator 33 to the antenna matcher 24 via the AM wave output terminal 34. In parallel with this, the pickup 35 picks up AM waves for anomaly detection.
  • the anomaly detector 36 calculates the anomaly discrimination value Vm based on the AM waves picked up by the pickup 35 and outputs the anomaly detection signal Se to the instantaneous halting unit 37 based on the anomaly discrimination value Vm.
  • the instantaneous halting unit 37 upon receipt of the anomaly detection signal Se, the instantaneous halting unit 37 outputs the anomaly detection signal Se to the audio unit 32 and controls the AM wave generator 33 to interrupt AM wave outputs for a certain period of time.
  • the AM wave generator 33 stops outputting the AM waves and thus the transmission antenna 25 halts emitting the high-frequency transmission signals to a space as radio waves, thereby interrupting broadcasting.
  • FIG. 5 is a process sequence chart of the audio unit upon detection of anomaly.
  • the trigger 42 of the audio unit 32 controls the output of the broadcast audio signals Sba based on the anomaly detection signal Se. More specifically, the trigger 42 of the audio unit 32 outputs, to the control memory 44 (step S12), the first control signal SC1 for setting a reproduction start point (rewinding point).
  • the control memory 44 sets the reproduction start point (reproduction start time: rewinding point) (step S13).
  • the trigger 42 of the audio unit 32 outputs, to the control memory 44, the second control signal SC2 for processing a silent part due to anomaly detection, in response to the cancellation of the anomaly detection signal Se (step S15).
  • the control memory 44 then outputs, to the shrinker 46, broadcast audio data which, with no interruption of broadcasting, would otherwise have been broadcast during the calculated silent time and until the silent time elapses from the reproduction start point (reproduction start time) (step S17).
  • the shrinker 46 outputs, to the AM wave generator 33, the broadcast audio signals Sba corresponding to the broadcast audio data based on the decoded broadcast audio data from the control memory 44 and the silent time data (step S18).
  • FIG. 6 is an explanatory diagram of specific operations.
  • FIG. 6(a) schematically presents reproduction states of the broadcast audio signals Sba at a transmitting end and a receiving end when no anomaly is detected, and occurrence of the same audio waveform.
  • FIG. 6(b) schematically presents conventional reproduction states of broadcast audio signals Sba on a transmitting end and a receiving end upon detection of anomaly. It is seen from the drawing that the reproduced broadcast audio signals Sba is interrupted at the receiving end from occurrence of the anomaly to recovery from the anomaly at the transmitting end. Conventionally, sound is thus interrupted at the receiving end and transmitted contents are also interrupted.
  • the broadcast audio signals Sba from output start time to output cancellation time of the anomaly detection signal Se are transmitted.
  • the shrinker 46 can be configured to adjust the actual reproduction time of the broadcast audio signals Sba for output to the AM wave generator 33.
  • FIG. 6(d) is an explanatory diagram of adjustment of the actual reproduction time of the broadcast audio signals Sba.
  • the shrinker 46 here shortens only the reproduction time by so-called time stretching without changing the pitch of the broadcast sound, and reproduces the signals for a length of time obtained by subtracting the silent time from the original reproduction time.
  • FIG. 7 is an explanatory diagram of the relation between a program broadcasting period and a commercial broadcasting period.
  • a commercial broadcasting period TB2 continues with a program broadcasting period TB1 .
  • broadcast program sound NS1 is broadcast sound which is originally scheduled to be broadcast in the silent period NS while broadcast program sound SS1 is broadcast sound which is originally scheduled to be broadcast in the broadcasting period TB1 after the silent period NS.
  • the broadcast program sound NS1 and the broadcast program sound SS1 are together subjected to time stretching and thereby controlled to be completely broadcast within a broadcasting period SS.
  • An actual program period thus falls within the original program period as illustrated in FIG. 7(c) , and is prevented from cutting into the commercial period.
  • the broadcast program sound NS1 and the broadcast program sound SS1 are both subjected to time stretching in the above description; however, with a short silent period NS, the broadcast program sound NS1 and a part of the broadcast program sound SS1 can be subjected to time stretching.
  • the part of the broadcast program sound SS1 can be a continuous part or discrete parts.
  • a head of the broadcast program sound SS1 may be subjected to time stretching integrally with the broadcast program sound NS1.
  • ends of the program broadcast sound NS1 and the broadcast program sound SS1 may be integrally subjected to time stretching.
  • the respective multiple parts of the broadcast program sound NS1 and the broadcast program sound SS1 may be integrally subjected to time stretching.
  • a part of the broadcast program sound NS1 can be deleted (usually a head part) and the remaining part of the broadcast program sound NS1 and the broadcast program sound SS1 can be subjected to the processing (time stretching) in the program period in the same manner.
  • the reproduction start point coincides with anomaly detection timing, and hence does not always fall at a phonetically appropriate point. Specifically, it may come at the middle of a word (for example a reproduction start time of the "r" sound of the word “broadcast”) or during reproduction of one sound (for example during reproduction of the "e” sound of the word “speech"). In such a case, it is possible to extract the head of a word or the head of a sound by sound recognition, for example and transmit the broadcast audio data from time corresponding to a phonetically appropriate separating point prior to the reproduction start point.
  • a word for example a reproduction start time of the "r" sound of the word "broadcast”
  • reproduction of one sound for example during reproduction of the "e” sound of the word "speech”
  • control memory 44 of the audio unit 32 outputs, to the AM wave generator 33, the broadcast audio signals Sba output within a period from the anomaly detection to the end of the anomaly detection.
  • the AM wave generator 33 This allows the AM wave generator 33 to generate AM waves again by the AM modulation of carrier waves based on the broadcast audio signals Sba output by the audio unit 32, and to output them to the pickup 35.
  • the pickup 35 outputs the AM waves output by the AM wave generator 33 to the antenna matcher 24 via the AM wave output terminal 34.
  • the antenna matcher 24 matches impedance between the output terminal of the transmitter 23 and the antenna 25.
  • the antenna 25 emits high-frequency transmission signals to a space as radio waves and continues to broadcast again.
  • the suppression of missing information can inhibit a listener from being affected by the silent state, for example.
  • the trigger 4 outputs the first control signal SC1 and the second control signal SC2 to the control memory 44 based on the anomaly detection signal Se from the instantaneous halting unit 37; however, the trigger 42 can be omitted and the control memory 44 can be configured to output and cancel the output of the anomaly detection signal Se, the first control signal SC1, and the second control signal SC2 in the same manner.
  • the audio unit 32 of the transmitter 23 functions as the broadcast relay assistance device; however, the broadcast audio signal generation device 21 or the relay device 22 can be configured to have the same or like functions (functions of the trigger 42, the control memory 44, and the shrinker 46).
  • the instantaneous halting unit 37 of the transmitter 23 is required to feed back the signals to the broadcast audio signal generation device 21 or the relay device 22.
  • a pilot signal may be superimposed on the broadcast audio signal Sba.
  • the pilot signal of a single tone may be used and added to a frequency other than audible frequencies (e.g. 7.5 kHz or more).
  • the above descriptions have exemplified a configuration that a commercial broadcasting period is not subjected to anomaly handling.
  • the above processing may not be performed, for example, to a broadcast period where the processing of broadcast sound may induce a copyright issue (e.g. music broadcasting period) or a broadcast period where processing to content is prohibited by law and content is required to be broadcast as it is (e.g. election broadcasting period).
  • the broadcast relay assistance device of the present embodiment includes a control device such as a CPU and a memory device such as a read only memory (ROM) or a RAM and thus can have a hardware configuration using a general computer.
  • a control device such as a CPU
  • a memory device such as a read only memory (ROM) or a RAM
  • a control program executed in the broadcast relay assistance device of the present embodiment can be stored and provided in an installable or executable file format on a computer-readable recording medium such as a CD-ROM, a flexible disc (FD), a CD-R, and a digital versatile disk (DVD).
  • a computer-readable recording medium such as a CD-ROM, a flexible disc (FD), a CD-R, and a digital versatile disk (DVD).
  • control program executed in the broadcast relay assistance device of the present embodiment may be stored in a computer connected to a network such as the Internet and provided by download via the network. Moreover, the control program executed in the broadcast relay assistance device of the present embodiment may be provided or distributed via a network such as the Internet.
  • control program of the broadcast relay assistance device of the present embodiment may be incorporated into a ROM or the like in advance.
  • the control program executed in the broadcast relay assistance device of the present embodiment has a module configuration including the aforementioned respective units or elements (memory, output unit, ).
  • a CPU processor
  • the memory, the output unit, ... are thus generated on the main memory device.

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Radio Relay Systems (AREA)
  • Transmitters (AREA)
EP14889887.7A 2014-04-23 2014-12-26 Rundfunkweiterleitungsunterstützungsvorrichtung, steuerungsverfahren für rundfunkweiterleitungsunterstützungsvorrichtung und steuerungsprogramm Active EP3136629B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2014089566A JP5937134B2 (ja) 2014-04-23 2014-04-23 放送継続支援装置、放送継続支援装置の制御方法及び制御プログラム
PCT/JP2014/084634 WO2015162831A1 (ja) 2014-04-23 2014-12-26 放送継続支援装置、放送継続支援装置の制御方法及び制御プログラム

Publications (3)

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EP3136629A1 true EP3136629A1 (de) 2017-03-01
EP3136629A4 EP3136629A4 (de) 2017-09-27
EP3136629B1 EP3136629B1 (de) 2020-01-22

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US (1) US10250344B2 (de)
EP (1) EP3136629B1 (de)
JP (1) JP5937134B2 (de)
CN (1) CN106233645B (de)
WO (1) WO2015162831A1 (de)

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EP4084366A1 (de) * 2021-04-26 2022-11-02 Aptiv Technologies Limited Verfahren zum testen einer rundfunkempfängervorrichtung in einem fahrzeug

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CN103986833A (zh) * 2014-05-22 2014-08-13 小米科技有限责任公司 异常状态监控方法及装置

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Publication number Publication date
WO2015162831A1 (ja) 2015-10-29
EP3136629B1 (de) 2020-01-22
JP2015210288A (ja) 2015-11-24
JP5937134B2 (ja) 2016-06-22
US10250344B2 (en) 2019-04-02
US20170041089A1 (en) 2017-02-09
CN106233645B (zh) 2020-01-31
CN106233645A (zh) 2016-12-14
EP3136629A4 (de) 2017-09-27

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